Self-contained die set



C. H. T AUSER SELF-CONTAINED DIE SET .Sept ll, 19.45.

Filed -Aug. 28, 1944 '5 Sheets-Sheet l Frlai m n u n m Sept 11, 1945. Y c. H. TAusER 2,384,708

SELF-CONTAINED DIE SET FiledAug. 28, 1944 5 Sheets-Sheet 2 5f v541 ,y 35 20 24 as Gi,

DIUDIUDIUDIQICDIOXWX Sept- 11 1945- c. H. 'rAusER y 2,384,708

l SELF-CONTAINED DIE SET Filed Aug. 28, 1944` 5 Sheets-Sheet 5 ""mmw".

Sept. Il, 1945. c. H.TAusER 2,384,708

` SELF-CONTAINED DIE sE'r Filed Aug. 28, 1944 5 Sheets-Sheet 4 67 ./4. Y Z?? I l U4 '5 @mi 'lll IIIA vllllll/lllI/llllllll lll llll 'l1/Ill] l VIII/lo [J7/[IM C l l 26 F155' f 25 z. 7. c VIIIIIIIIIII/l l v .111111 4 nur 31 Patented Sept. 11, 1945 UNITE-D STATES PATENT orrlci-z SELF- CONTAINED DIE. SET

Charles H. Tauser, Venita Park,I Mo., assignorito McDonnell Aircraft Corporation, St. Louis, Mo., a corporation 'of Maryland Application August 28, 1944,`Serial`No. 551,553 Y 24'Claims. (Cl. IEM-13)` This invention relates to die sets, particularly self-contained, unit-handled die sets of the kind shown in my PatentNo. 2,338,982 granted January 1l, 1944. Thevprincipal objects of the invention are to provide means for automatically removing the stampings-and/or punchings from the die set after each complete operation thereof, to provide for the application to and removal from the die press of saidmeans with said die set as a `complete.preassemloled unit; to initiate and control the cycle of operations of said means by the movementof said die set in said die press. Other objects are-to provide, aspart of said unithandled die set, a continuously operating unidirectional motor, a normally disengaged clutch for operatively connecting the stamping Yand punching-removingmeans to said vmotor for actuation thereby, mechanism directly controlled by said die set for engaging said clutch after each complete .operation .of the die elements, and mechanism for` awtomatically Vdisengaging said clutch after each complete operation of said stamping andvpunching removing means. Other objects are toprovide a stamping and punching removing mechanism `including a carriage movable on said-die set, aA wiper movable with said carriagaand an endless unidirectional sprocket chain having a .connection with said carriage, whereby a reciprocating movement is imparted to said carriage andlthe wiper member sustained thereby by a one-direction movement of said sprocket chain. Other objects4 are to provide for simplicity and cheapness of construction and compactness of design, and-to attain-other advantages hereinafter appearing.

The invention consists in the self-contained die set and stamping and punching removing unit and .in the construction, combinations and varrangements of parts hereinafter described and claimed.

In the accompanying drawings, which form partei this specication and wherein like symbolsrefer tolike-.parts wherever they'oc'cur,

Fig. 1 is a top plan View of a self-contained die set embodying my invention, parts of the punch plate, work and die plate being shown broken away,

Fig. 2 isa front end elevational View of the die set, with the guard or shield at one side thereof shown in vertical section,

'Fig is a side elevational view of the die set, withthe guard on that side shown broken away,

Fig. 4 is a view similar to Fig. 3, showingthe 'mechanism at the end of its wiping stroke,

Fig. 5 is Van enlarged fragmentary horizontalv section on the. line- 5--5.in.Fig. 3,

Fig. 6` isanenlarged fragmentaryvertical section'on the lineG--E in Fig.-.3,

Fig. A7.is.an enlarged-fragmentary vertical section onthe. line'l-'l in Fig.. 4,

Fig. .8 isan enlarged `.Vertical fragmentary section on the line 8 8 in. Fig. 3,

Fig. 9 is an enlargedifragmentary vertical section on the line f9 4!) in Fig. 1,

`Fig...10xis an enlarged fragmentary vertical sectionen the line IU--ID in Fig. l,

Fig- 1 1 isa vertical cross-sectional view on the line Il--I Ir in Fig. 1,

Fig. `12 is .a vertical longitudinal sectional view cn the linev l2'-|2 inFig. 1,

Fig. Y13 .isa view similar to Fig. 12, showing the punchand die members in .1owermost, `operative-position, i

Fig. 14 is a view similar to Fig. 12, showing the wiperblade during itsymovement across the die body tostrip the stampings and slugs .or punchings therefrom, y

Fig. 15 is an enlarged vertical fragmentary central section through vone of the rest .blocks for the wiper blade,

. Fig. 16 is-a vertical transverse section on the line lli-I6 n.Fig. 1, showing the positions of the clutch operatingparts in the parking posil tionof the wipermechanism, y

Fig. 17iis an enlarged. fragmentary cross-section similar toFig. 16,` showingftheposition of the clutch .operating parts at the end of the downward movement of the punch. and die plates,

Fig. 1`8`is a View similar to Fig. .17, showing the position of theclutch operating parts atI the end of the upward travel of the punch anddie plates,

Fig. 19 is an. enlarged vertical section: on the line lll-I9 inlFig.. 16,

Fig. 20 is a plan View `of .the spring-pressed clutch disengaging member,

Fig. 21 is a side elevational viewpf the carriage which supports the member for operating the rocker lever for breaking the break-joint of the clutch mechanism, the supporting blockfor said member being shown in vertical section,

)Fig 22 is a perspective view of the clutch operating washer shown in Fig. 1D,

Fig. 23. is a `perspective view of the clutch shipper fork,

Fig. 24 is afperspective view of the control arm for the break-joint,

Fig. 25 is a perspective View of the extensible Y break-joint link, showing the elements thereof disassembled; and.

Fig. 26 is a perspective view of the supporting yoke for the clutch shipper fork.

In the accompanying drawings, my invention is shown embodied in a self-contained, unithandled die set of the type shown in my Patent No, 2,338,982 of January 11, 1944. In the present drawings, the die set is shown mounted on the bolster A of a conventional die press immediately below the vertically reciprocatory ram or slide member B thereof. Said unit comprises a substantially rectangular body I that seats on the bolster A of the die press and has a flat top face 2 and a sharply inclined or beveled end face 3.

Located above the body or bed I-of the die set is a horizontally disposed rectangular die .plate 4;

and located above said die plate is a horizontally l disposed rectangular punch plate 5 that is provided On its underside with a suitably shaped blanking punch member 6 adapted for cooperation with a similarly shaped blanking die opening 'I provided therefor in said die'plate. If desired, the punch plate may be provided on its underside with one or more piercing or perforating punches 6a adapted for cooperation with similarly shaped die openings 1a provided therefor in said die plate. The punch plate 5 is located below the press ram B in position to be engaged by the enlarged lower plate portion 8 `thereof when said ram moves downwardly in the press. The die plate 4 and punch plate 5 are supported for vertical movement relative to one another and to the body l of the die set unit under the downward pressure `of the press ram by means of upright cylindrical guide posts or leader pins 9 located at the four corners of said body. Each of the guide posts or leader pins 9 is slidably supported in a sleeve I0, which is slidably supported in a bushing II xed in a vertical bore I2 provided therefor in the .corner of the body I. The punch plate 5 is secured by means of a countersunk screw I3 to thetop of the post 9; and the die plate 4 seats on the upper end of the slidable post supporting sleeve III. Each of the posts 9 has a stop member or washer I4 rigidly secured at the lower end thereof by means of a screw I5. The slide sleeve I0 seats on the stop washer I4 fixed to the lower end of the post 9; and said Washer abuts against the lower end of the bushing II and thus limits the upward travel of said sleeve and post relative to said bushing. Each post 9 and the sleeve II associated therewith is yieldably supported in the vertical bore I2 therefor in the body I by means of a coil cornpression spring I6 located in said bore between the stop washer I4 iiXed to the lower end of said post and a threaded closure plug I'I for the lower end of said bore.

A rubber spacing sleeve'l nts around each post 9 between the die plate 4 and the punch plate 5 and serves normally to space them apart. When the punch plate 5 is engaged by the descending ram B of the punch press, the punch plate, die plate 4, posts 9 and sleeves Ill move downwardly together against the pressure of the springs I6 B ascends after the punching operation, the punch and die plates are separated by the vertical expansion of the rubber sleeves I8 and are raised by the springs I6. Non-sticking rubber stripper strips I9 xed to the underside of the punch plate around the punch elements 6 and 6a serve to prevent the stock C from lifting with said elements upon the upstroke thereof, following the punching operation.

'Ihe stock C, which is shown in the form of a sheet metal strip or plate, is manually slid between the punch and die plates from the front end of the die body; that is, from the end `of said body opposite .the tapered or downwardly inclined end 3 thereof. The metal strip C is preferably 'fed by hand between the punch and die plates;

and the die plate Il is provided on opposite sides with a series of upstanding pins 2G between which said strip is guided during the manual feeding thereof. When ythe press ram B descends, the plate 8 at the lower end thereof strikes the punch plate 5, thus forcing said punch plate, together withthe strip C to be blanked and punched and .thedie plate Il, downwardly iuitil the die plate seats on the flat top surface 2 of the body, after which the punch plate moves downwardly relative to the die plate to form perforations 2! in the strip and to punch a stamping or blank 22 from the portion of the strip in which such perforations were made by the preceding punching operation of the die set. When the punch and die plate ascend with the press ram B, the die plate Ll lifts off the flat top face 2 of the body I, carrying with it the punched strip C, while the punch plate 5 is moved upwardly away from the die plate by the expansive action of the rubber sleeves I8, the perforated blank or stamping 22, together with the punchings or slugs 23 from the perforations being left below said die plate and lying on said flat top face of said body.

The above die set unit is provided with means responsive to the movement of the die set for automatically removing the stamping 22 and punchings 23' from the flat top surface 2 of the body I after each complete operation of the die set. As shown in the drawings, said means preferably comprises a horizontally disposed reciprocating Wiper blade or pusher bar 2li .that extends crosswise of the die set beneath the die plate li and is normally disposed just forward of the front end of the flat top face 2 of the body I of the die set. After each complete operation of the die elements, the wiper blade 24 moves rearwardly over the fiat top surface 2 of the body I and pushes the stamping 22 and slugs 23 off the rear end thereof and then reverses its direction of movement and returns to its original position at the front end of said surface. In its forward, lparked position, the wiper blade is supported on rest blocks 25, with the lower face of said blade disposed flush with or slightly above the level of the top surface I of the body. Each of the rest blocks 25 has a downwardly opening recess 26 therein adapted to receive the upper end of a coil supporting spring 2'I therefor whose lower end seats in a recess provided therefor in the upper end of a vertically adjustable upright supporting pin 28 whose lower end is threaded into a'lug 29a on a combined motor and clutch housing 29 that is secured by screws 30 to the front end of the body I of the die set below .the level of 4the flat top surface 2 thereof. The upper, spring supporting end of Ithe pin 28 is disposed within the downwardly opening recess 26 in the rest block 25; and upward movement of said block relative to said pinis limited by means of a stop washer 3i' that is iixed to said block and abuts against an overhanging annularv shoulder 28a provided therefor on said pin. The pin 28 is locked inthe desired position of vertical adjustment by means of a lock nut 28h.

The wiperblade 2li extends on opposite sides of the body i of the die set and has its ends operatively connected to carriage members 32 for movement therewith. Each o the carriages 32 comprises a vertical plate provided with upper and lower pairs of rollers 33 that operate in longitudinallygroov'ed upper and lower guide rails 3i`that are secured by screws 35 to the adjacent side face of the body .i and extend substantially from end to end thereof. The ends of .the wiper blade 2Q: extend into horizontal openings 36 providedtherefor in the carriages, said end snugly fitting the sides of said openings which are elongated vertically so as toV permit vertical movement oi the blade relative to said carriage during the punching operation of the die set.

A joint rearward and return movement is imparted to the two wiper carriages 32 preferably by means of sprocket chains 3'! `that extend lengthwise of the body I between the sides thereof and the carriages. The two sprocket chains 3l are supported at their forward ends on drive sprocket wheels 2&3 that areixed to the exposed ends of a horizontal sprocket shaft 39 that eX- tends through the housing 26 and is rotatably supported 'therein in suitable antifriction bearings 4B located in the endsthereof. The opposite or rear end of. each sprocket chain 3l is supported on an idler sprocket wheel @i journaled `on an outstanding horizontal stud 42 iixed to a plate 43' slidably mounted in a recess 1M provided therefor in the adjacent side wall ofthe body l. The plate 43 is adjusted longitudinally in the supporting recess 'te to properly tension the sprocket chain 3i byniean's of an adjusting screw E5, which is threaded into the forward end of the plate with itshead in endwise abutting' relation to the front end of said recess, `the screw being locked in the desired position of the axial adjust- The sprocket slotsfbl in said plate and are .threaded into the adjacent side' face of the body I.

Each carriage 32 is connected to the sprocket chain 37 adjacent thereto for movement therewith by means of a roller 49 that is journaled on an outstanding horizontal stud i) vfixed to said chain and works in a vertical elongated slot 5l iin said carriage. By this arrangement, the sprocket chains 31, although Voperating in one direction, impart a reciprocating' motion to the carriages 32 and to the wiper blade 24 connected thereto, the carriages moving rearwardly with the rearwardly moving stretches of the chains and then returning to their forward position with the forwardly moving stretches of the chains, the

yvertically elongated slots`5l permitting the rollers or cams 49 to follow the curved path of .travel of the chains at the ends thereof and thus reverse the direction of movement of said carriages and also .accelerate andiretard the motion .of the carriages at 4the beginning and end of each stroke.

As .shown in the drawings, the carriages and 1 sprocket driving mechanism therefor are covered by suitable guard casings la removably secured to opposite sides ofthebody i.

The driving sprocket shaft 39 isrotated by means of a continuousl-y operating unidirectional electric motor :52rwhich is mounted in the :housing 2,9E lengthwisethereof andinas. as hollowv armature or frotor shaft `53 through whichsaid sprocket shaftv extends. Thehollowumotor shaft 53 terminatesxat one end in a tubular drive element 5-4 and is operatively zconnected to the sprocket shaft AI'Siito drive the same by means of an axially engaging multipledisk clutch:` comprisingT a multiplicityiof axially movable disks 55 Valternately attached to said drive element and'sprocket shaft. The clutch disks 55 are e'ngaged'by van axially movable pressure plate 5SY that is actuatedxbyr atcircular vseries o'f yradially movable `balls 5T interposed between the conical ends of said plate and a supporting sleeve 58 which is iiXed tothe sprocket shaft 39 for rotation therewith. The clutch ballsl areforced radially inwardly into engagement with the conical ends of the fixed clutch sleeve 58 and the axially movable pressure `plate 5Stto set the clutch in engaging position preferably by'means of a shipper sleeve 59 that .is mounted on said clutch sleeve and includes a ring .60 having outstanding trunnions 5I that ii-t withinnotches 62a provided therefor inzthefreeends of'thetwo upstanding arms of acshipper` fork E2.

The clutch operating mechanism also includes a circular series of plungers 6'3 that are supported for'longitudinalsiidinglmovement in the clutch sleeve 58 between the shipper sleeve .58 on one end thereof :and a hardened steel lock iring4 E4 which is rigidly iiXed to the `housing '29 at the other'end 4oi said-clutch sleeve. The lock ring (i4 has a circular series `of pockets 64a therein adapted to receive the adjacent rounded ends 63a of the plungers 53. By this arrangement, when'the shipper fork 62 is actuated to move the shipper' sleeve 59 to clutch disengaging position, the plungers 63 are slid endwise by said sleeve intov the pockets in the' direction of the xed lock ring-64 and lthe rounded ends 63u of said flanges seatin the pockets: Esa-of said lock ring, thus locking -the'spro-cket'shaft `39 against rotation. Whenthe shipperiork $2 ,is actuated to move the shipper sleeve 59 in the opposite direction, the balls v5'1 are forced inwardly against the pressure plate 55, thus engaging the friction disks 55u-on "the sprocketshaf t 39 i and thedriving element 540i the tubularmotor shaft 53, and causling said .sprocket shaft to rotate with said motor shaft. During this clutch engaging movement of the shipper sleeve 59, the plungers 63. are released from the pockets `(Mu in the lock ring B4 before `said shipper sleeve -moves vfar enough `to engage the clutch and cause .the sprocket shaft 39 to rotate;

The shipper fork S2 is mounted for vertical swinging movement lengthwise of the clutch axis on a horizontal pivot65 mounted inthe upper ends of the upstanding arms of a supporting yoke 6G that is pvotally supported for vertical swinging movement-,lengthwise of .the clutchaxis on a horizontal pivot shaft 61 mounted in'the housing .29 below andiparallel with a shipper fork supporting pivotl'; The clutch is normally held in disengaged position by means of `an expansion coil spring 68 which is supported in a horizontal pocket [i9 provi-ded therefor in the housing2-9 opposite thef upper end of one arm` of the shipper fork supporting yoke 66 and has a fitting 10 at its outer end which carriesa horizontal pin 1| that l:isheld by said spring in a semi-circular notch 'I2 provided therefor in the adjacent end of one of the two links 13 and 14, respectively, of a normally bent break-joint linkage T.

The link 13 of the break-joint is an extensible link comprising end sections and 16 and an intermediate section 11. The end section 15 is pivotally secured to the outermost arm of f the yoke member B6 by means of the shipper fork supporting pivot therefor and has the notch 1,2 therein for the spring-pressed clutch disengaging pin 1I. This end section 15 of the link 13 has a cylindrical stem portion 15a which is slidable in the axial bore of the intermediate section 11 which is threaded into a longitudinal bore in the adjacent end of the end section 1S, whose opposite end is bifurcated to receive one end of the other link 14. This end of the link 14`is pivotally secured to the bifurcated end of the end section 16 of the link 13 by means of a pivot 18. The other end of the link 14 is fixed to a horizontal shaft 19 journaled in the adjacent side of the housing 29. As shown in the drawings, the shaft 19 has a control arm 80 fixed to the outer end thereof that projects beyond the adjacent end of the combined motor andclutch housing 29 and is adapted to be manually o-perated to straighten the break-joint T and thus engage the clutch and bring the wiper mechanism into operation without operation of the blanking and punching mechanism.

The break-joint T is held in bent, clutch disengaging position by the pressure of the spring pressed pin 1l against the adjacent end of the link 13; and the intermediate section 11 of said joint is yieldably held in endwise abutting relation to a shoulder formed by the reduced stem portion 15a of the end section 15 of the toggle link 13 by means of a torsional spring 8i which is sleeved on the shaft 19 between the control arm and the housing 29 with one end anchored to said arm and the other anchored to said housing. The housing 29 encloses the motor, the clutch and the clutch operating mechanism therefor and has an opening 82 through its outer side -wall through which access may be had to the clutch and clutch operating mechanism, this opening being closed by a removable cover plate 83.

The front corner post I0 located adjacent to the clutch operating mechanism is operatively connected thereto to straighten the break-joint i T during the downward travel of the die set and to engage the clutch when the die set reaches the end of its upward movement. This connecting means comprises an outstanding arm 84 on the stop washer I4 for the post located adjacent to the clutch operating mechanism. This arm 84 extends through a vertical slot |2a provided therefor in the wall of the bore l2, the post 9 and the supporting spring I6 therefor. The arm 811` has a ball-and-socket connection 85 with the up- -per end of an extensible link `86 whose lower end has a similar connection 81 withv the outer end of an operating arm 88 that projects from the shipper fork 62 alongside of the link 13 and is disposed in a substantially horizontal position in the bent position of the break-joint T. The extensible link 86 comprises an upper end section 89, a lower end section 90 and an intermediate section 9| having reversely threaded end portions enaging the respective end sections, whereby the link may be lengthened and shortened by rotating the threaded intermediate section relative to said end sections.

Extendinglengthwise of the body I of the dier vset near the front end thereof on the side adjacent to the control arm 80 for the break-joint T is a rock lever 92 that is secured by means of a horizontal pivot 93 to said side of said body for vertical swinging movement relative thereto and to said control arm. The front end of the rock lever 92 has a roller 94 journaled thereon that is disposed beneath the free end portion of the control arm 80 for engagement with the underside thereof just before the stationary or forward position of the carriages 32. The rear end of the rocker lever 92 is also provided with a roller 95 adapted, during the return movement of the carriages, to be depressed by a trip member 95 carried by the carriage located above said lever, to thereby swing the forward end of said lever upwardly and thus swing the control arm 80 in the same direction to break the straightened joint T and disengage the clutch. The rock lever 92 is provided rearwardly of its supporting pivot e3 with a horizontal pin 91a adapted to bear against the underside of an eccentric roller 98 mounted on a horizontal pivot 99 secured to the adjacent side of the body. The eccentric roller 98 serves as an adjustable stop which limits the downward swinging movement of the roller 94 at the front end of the rocker lever and thus limit the downwardly swinging movement of the control arm 80 and the upward movement of the joint T to straight line position.

The trip element 96 comprises a plate that is supported on a horizontal pivot |00 for vertical swinging movement in the direction 0f the carriage travel. -The trip supporting pivot |00 is mounted in a supporting block IUI that is clamped by vertical screws |02 to the bottom edges of two horizontal plates l 03 rigidly fixed to the outer side face of the carriage. The heads of the screws m2 are supported on a washer plate H14 that seats on the upper edges of the two plates 103; and saidlast mentioned plates arespaced apart horizontally to provide a vertical slot |05 which extends in the direction of movement of the carriage and through which said screws extend downwardly and are threaded into said trip supporting block. By this arrangement, the trip 95 may be adjusted longitudinally of the carriage to vary the point in the return travel thereof at which the trip engages the roller y95 at the rear end of the rock lever 92 to swing the roller 94 at the front end thereof upwardly against the control arm 80 to break the toggle joint T. The trip 9S is provided with a stop pin H16 which is normally held in engagement with the front end of the supporting block IDI by means of a coil tension spring H31 having one end anchored to said block and the other end secured to a pin H38 carried by said trip. By this arrangement, the trip 9B is adapted to swing upwardly and ride over the rearmost roller 95 on the rock lever 92 during the rearward movement of the carriage and is adapted to abut against said roller to depress the same and raise the front roller 9d during the return movement of the carriage to the front end of the die set.

The hereinbefore described combination die set and Wiper mechanism operates as follows:

In'the inoperative position of the die set and wiper mechanism, the two carriages 32 are at rest at the front end of the die set, the wiper blade 24 is seated on the rest blocks 25 with its lower surface disposed in the plane of or slightly above the ilat top surface l of the body and the control arm 80 is raised to break the break-joint T and disengage the clutch. After the work C is inserted between the die plate 4 and the punch plate 5, the punch and die plates move downwardly relative to each other and to the die body I in the manner hereinbefore described; whereupon the operating arm 88 of the shipper fork .6.2 is swung downwardly due tothe linkconnection 86 with the arm 84 of the stop washer i4 fixed to the adjacentl downwardly moving post .9. This downward movement of the operating arm 88 of the shipper fork 62 causes said fork to pivot about the trunnions 6l on the ring 69 in the clutch shipper sleeve 58 and the shipper fork supporting yoke 66 to pivot about the supporting pivot shaft 6l provided therefor in the clutch and motor housing 29 without engaging the clutch. This pivotal movement of the shipper fork 92 and its supporting yoke 66 is against the pressure of the spring pressed pin 1| that seats in the notch 12 in the extensible link .'13 and serves to bring the bent joint T into straight line position, in which position the pivots 65, 'i8 and 'i9 are all substantially in the same horizontal plane, whereby the joint cannot be .broken by the pressure of said pin. The lstraightening .of the `joint also causes the control arm 89 to swing downwardly into engagement With the front roller 94 of the rock lever 92, thereby preventingcrosstravel of said joint to straight line position. Thus, during the downward movement of the punch and die platesJ the joint is straightened but no clutch engagement movement is imparted t the shipper fork 62. f

After the stamping and punching operations,

`the post or `leader pins 9 are forced upwardly by .the springs I6 and the link 86 is pulled upwardly by the stop washer I4 having the arm 84 thereon, thereby swinging the operating arm 88 of the shipper fork 62 upwardly and causing said fork to swing on its pivot 65 in a direction which will engage the clutch when said lposts reach the limit ofv their upward travel. When the clutch is .en-

gaged, the sprocket shaft 39 is rotated by the continuously operating motor 52 and .the drive Asprocket wheels 3l are rotated in a direction which will Vcause the rollers 49 and the carriages 32 associated therewith to move rearwardly with the upper stretches ofthe endless sprocket chains .3l along the guide rails 34 to the rear end of the body and then move forwardly with the lower stretches of said chains to the front end of said body. During the rearward movement of the carriages, the wiper blade 2li movestherewith rearwardly across the flat top face 2 of the bodyto push the blanks 22 and slugs 23 off the downwardly beveled rear end 3. During the return movement of the carriages and the wiper blade to their forward or parking position, thetripper plate 96 carried by one of said carriages engages a direction that will disengage the clutch.

The hereinbefore described arrangement provides a simple, economical and compact selfcontained die set and powerdriven wiper unit which requires a minimum amountof .tool crib storage space and which may be readilymounted in and dismountedrfrom a conventional die press without alteration thereof. The stampings -22 andpunchings 23are quickly removed automatically from the die set after each complete operation thereof; and the cycle of .operations of the wiper mechanism is controlled entirely by the movement of the die set. The slot-and-roller connections 49-.5l between the sprocket chains and the carriages permit. a reciprocating movement to be imparted to said carriages without reversi-ng the drive for said chains; and the movement of thecarriage operating rollers .49 around .the pitch diameter of the sprocket wheels serves to accelerate and decelerate the carriage travel -at the start and .end of each stroke. The eccentric adjustment 93 enables'the rocker lever 92 to beadjusted to `control the straight-line position of the break-joint. 'I'he link 86 may be lengthened .or shortened to compensate for manufacturing inaccuracies. The extensible link 13 permits over-travel of the link 86 after the breakjoint; reaches its straight'. lineY of position; and the adjustment of the. trip plate 96 provides for varyingvthe point in the return movement of the carriage at which the break-joint is bent to release the clutch.

When the clutch is thus disengaged, the plungers E3 carried by the sleeve 58 rigid with the sprocket shaft 39Vsea'ts in the pockets 64a provided therefor the `iXed lock ring S4, thereby locking `said sprocket shaft vagainst rotation and thus locking the carriages in inoperative position opposite the front end of the flat stamping and slug supportingtop face 2 "of the body I. When it is desired to. operate the wiper mechanism without operating the. die set the control arm is manuallydepressed until it contacts the roller Slt at the frontend of the rocker lever`.92, thereby straightening the break-joint T and thus starting the round of operations required to cause the wiper -blade 2li-to move rearwardly over the top aef of .the body l andthen return to its original position -at the front. end thereof..V The `spring.-supported wiper rest .blocks 25 permit the tained die set and wipery assembly admits of considerable` modification without departing from the invention. Therefore, I do not wish to be .limited -t o the-precise -arrangement shown and described.

What I claim is: l. A die set cemprisingrelatively movable punch and die members, a member reciprocable beneath f5.5,

' ings or blanks or `punchings `produced thereby, and

said members for removing from said die stampfand die members, a member reciproeable vbeneath said members substantially at right angles to the directionfof movementthereof for` removing from said 'die stampings or blanks'or punchings pro- .duced thereby, and `means controlled .by-the relative movement of said punch .and die members for actuating said reciprocable `member after each `complete koperatioi-i of said die elements, all

adapted for vapplication `to and removal from a die-press asia complete self-contained unit.

3. A die'I-seticomprising relatively movable punch and die members, means for removing from said die-set blanks .and/or punchings produced thereby, said-means-includinga member mounted below said punch and die members forvsliding movement from one side of said'die set to the opposite side thereof and then back to said rst mentioned side, and means controlled directly from Said punch and die members for imparting such sliding movement to said member after each complete operation of said die elements.

4. A die set comprising relatively movable punch and vdie members, means for removing from said die set blanks or punchings produced thereby, said means including a member mounted below said punch and die members for movement from a position at one side of said die set to a position at the other side thereof and then back to said rst mentioned position, means 'controlled by the relative movement of said punch and'die members for imparting such sliding movement to said member after' each complete operation of said die' elements. and means for rendering said rst mentioned means inoperative upon the return of said member to said rst mentioned position.

5. A die set comprising relatively movable punch and die members, means for removing from said die set blanks or punchings produced thereby,

said means including a member mounted below said punch and die members for movement from a position at one side of said die set to-a position at the other side thereof and then back to said `iirst mentioned position, means controlled by the `relative Ymovement of said punch and die members for imparting such sliding movement to said member after each complete o-peration of said die elements, and means controlled by the movement of said member back to said first mentioned position for rendering said rst mentioned means inoperative when said member reaches such position.

6. A die set comprising relatively movable punch and diemembers, means for removing vfrom said die set blanks or punchings produced thereby, said Vmeans including a member having an operating cycle comprising a movement of said member from one side of said die set to the opposite side thereof and a return movement of said member to said first mentioned side after each complete operation of said die elements, means controlled by the relative movement of said punch and die members for starting said cycle of operation, and means controlled by the return movement of said member for terminating said cycle of operations'k when said member reaches said rst mentioned position. v

'7. A die set comprising a body having a plain top surface, superposed punch and die members mounted above said surface for vertical movement relative thereto and to each other, a wiper member reciprocable over said surface for removing therefrom stampings or punchings produced by said punch and die members, and means controlled by the relative movement of said punch and die members for imparting one complete reciprocation to said reciprocable member after each complete operation of said die elements.

8. A die sei-,comprising relatively movable punch and die members and means controlled directly from said punch and die members for automatically removing from said die set after each operation thereof blanks or punchings produced thereby, said means including a power operated pusher element adapted to move from a parking position at one side of said die set to a position at the opposite side thereof and reverse its direction of movement and return to such parking position.

V9. A die set comprising relatively movable by the relative movement of said punch and die members for automatically removingfrom said die set afterV eachv operation thereof blanks or punchings produced thereby, said vmeans including a power operated pusher element adapted to move from a parking position at one side of said die set to a position at the opposite side thereof and reverse its direction of movement and return to such parking position, and means oper- 10 able during the return movement of said pusher element for stopping the same in such parking position.

10. A die set comprising relatively movable punch and die members, a member reciprocable l5 beneath said members for removing-from said die blanks or punchings produced thereby, a continuously operating motor, a normally disengaged clutch for operatively connecting said member to said-motor for actuation thereby, and means controlled by the relative movement of said punch and'die members for engaging said clutch after `each complete operation of Said die elements.

11. A die set comprising relatively movable punch and die members, a member reciprocable .beneath said members for removing from said die blanks or punchings Yproduced thereby, a continuously operating motor, a normally disengaged clutch for operatively connecting said member to said motor for actuation thereby, means conv trolled by the relative movement of said punch ber. A

12. A die set comprising relatively movable `punch and die members, a member reciprocable beneath said Ymembers for removing from said die blanks or punchings produced thereby, a con- '40 'tinuously operating unidirectional -'-motor, a normally disengaged clutch for operatively connecting said member to said motor forreciprocation thereby, means controlled by the relative movement of said punch and die members for engaging said clutch after each complete operation `,of said die set-means for normally disengaging said clutch,'ar1d means forv automatically disengaging said-clutch after a complete reciproca- `tion of said member.

13. A-die set comprising -relatively movable punch and die members, a wiper member reciprocalole` beneath said punch and die members for removing from said die set blanks or punchjings produced thereby, a normally-inoperative 5'5 unidirectional endless sprocket chain operatively `connected to said 'Wiper member for reciprocating the same, a continuously operating unidirectional motor, a normally disengaged clutch Vfor operatively connecting said motor' to said sprocket to drive the same, means controlled by the relative movement of said punch Yand die members for engaging said clutch after each complete operation of said die set, 'and means for automatically disengaging said clutch after each complete reciprocation of said wiper member.

Y' body, a Wiper member supported by said carriages for movement thereby over said body` to remove Atherefrom blanks or punchings produced by said punch and die members, a pair of endless sprocket vchains extending in the direction of carriage punch and die members and means controlled 75movement, connections between said chains and carriages whereby one complete reciprocation is imparted to said carriages andthe wiper member sustained thereby for each complete circuit of said sprocket chains, means operated by the movement of said punch and die members for operating said sprocket chains, and means operated by said carriages for stopping'said chains after each complete circuit thereof.

15. A die set comprising a body having a fiat top fface, vertically movable punch'and die members located above said body, apairof carriages supported for horizontal movement along opposite sides of said body, a wiper member supported lby said carriages for movement thereby over said body to remove from the flat top face thereof blanks or punchings produced by said punch and die members, ar pair of endless sprocket chains extending in vthe direction of carriage movement, connections between said chains and carriages whereby one complete reciprocation is imparted to said carriages .and the wiper member sustained thereby for each complete circuit of said sprocket chains, means operated by the movement of said punch and die cmembers for operating said sprocketchains, and means operated by said carriages for stopping said chains after each complete circuit thereof with said wiper member clear of said flat. top vsurface of said body member.

16. A die set comprising a body, vertically movable punch and die members located above said body, a pair of carriages supported V'for hori- Zontal movement along opposite sides of :said body, a wiper member supported by said carriage for movement thereby over said body to remove therefrom blanks or punchings producedby `said punch and die members, a pair of endless sprocket chains extending along said opposite sides of said body in the direction of carriage movement, connections between said chains and the respective carriages comprising a pin on each ,chain and a vertical slot therefor in said carriage whereby one complete reciprocation is imparted to said carriages and the wiper member sustained thereby with each complete circuit of fsaidichains,

means operated by the movement of said punch and die members for operating said vsprocket chains after each `complete operation of said punch and die members, and means operated by said carriages for stoppingsaid chains after each.

complete circuit thereof.

17. A die set comprising .a body having a flat top surface, vertically movable punch and die members located above saidbody,.a -pair of carriages supported for horizontal movement aloner opposite sides of said body, va wiperfmember supported by said carriage for movement. `thereby over said body to remove from the fiat top surface of said body blanks or punchings produced by said punch and die members:a pair of endless sprocket chains extending along said opposite sides of said body in the direction of carriage movement, connections between said chains and the respective carriages comprising a pin on each chain and a vertical slot therefor in said carriage whereby one complete reciprocation is imparted to said carriages and the wiper member sustained thereby with each complete circuit of said pinsaround said chains, means operated by the movement of Said punch and die members for operating said sprocket chains after each complete operation of said punch and die members, and means operated by said carriages for stopping said chains after each complete circuit thereof with said wiper member in a parking position beneath said rdie member butnlearsaid iiat top surface of said body, said-wiper member being supported on said carriages forsdownward yielding movement under the Vdownward,movement of said die members.

18. A die set comprising a body, vertically `movable punch and die members located abovesaid body, a pair of carriages supported for horizontal movement along opposite sides of `said body, a wiper member supported .by said carriages for movement thereby over said body to remove therefrom blanks or punchings producedby said punch and die members, a pair of endless sprocket chains extending in the direction :ofthe carriage movement along said sides of said body, connections between said chains and the respece tive carriages whereby one complete reciprccation is impartedto said carriages `and the wiperrmember sustained thereby for each complete circuit of said sprocket chains, driving sprocket wheels for said sprocket chains, a sprocketshaft.forisaid sprocket wheels, an electric motor, a clutch for coupling said shaft to said motor, means-con trolled by the movement of saidk punch and .die members for engaging said clutchafter: each complete operation of said 'die set, and .means operated by one of said carriages for disengaging said clutch after each complete circuit of said chains and each complete reciprocation of .said wiper member. i

19. A die set comprising. a body, vertically said body, a pair of carriages supported-for horizontal movement'along opposite fsides of Isaidboily a wiper member supported by rsaid carriages for movement thereby over said body to remove therefrom blanks or punchings produced byv said punch and die members, a pair.ofendlessfsprocket chains extending in the direction of the ,carriage movement along said sides of said body, connections between said chainsand the. respective carriages whereby one complete reciprocation is imparted to said carriages and the wiperrnemF ber sustained thereby for each complete circuit `of said sprocket chains, driving sprocket -wheels for said sprocket chains, a sprocket shaft for Asaid sprocket wheels, an electric motor, a -clntch for coupling said shaft to said motor andmeans for actuating said clutch including a clutch .shipper fork operable by the Vupward movement of ,said punch and die members to engage said-.clutch and operable byone of said carriagestodisengage said clutch after each complete reciprocation of said wiper member.

20. A die Set comprising. a body, yertically movable punch and die members located `above said body, a pair of carriages -supported'for horizontal movement along opposite sides ofv said body, a wiper member supported by said carriages for movement' thereby over saidbody to remove therefrom vblanks or punchings produced by said punch and die members, ga `pair of endless sprocket chains extending in the direction of the carriage movement along said sides of said body, connections between said chains and the respective carriages whereby one complete reciprocation is imparted to said carriages and the wiper member sustained thereby for each complete circuit of said sprocket chains, driving sprocket lwheels for said sprocket chains, `a sprocket shaft for said sprocket wheels, a continuously operating unidirectional electric motor including a tubular armature shaft through which said sprocket shaft extends, a clutch for coupling said sprocket shaft to said armature shaft and for locking said sprocket shaft against rotation when said clutch is disengaged and for unlocking said sprocket shaft when said clutch is engaged, and means operable by the movement of said punch and die members for engaging said clutch after each complete operation or" said die set and operable by one of said car* riages for disengaging said clutch after each complete circuit of said chains.

21. A die set comprising a body, vertically movable punch and die members located above said body, a pair of carriages supported for horizontal movement along opposite sides of said body, a wiper member supported by said carriages for movement thereby over said body to remove therefrom blanks or punchings produced by said punch and die members, a pair oi endless sprocket chains extending in the direction-of the carriage movement along said sides of said body, connections between said chains and the respective carriages whereby one complete reciprocation is imparted to said carriages and the Wiper member sustained thereby for each complete circuit of said sprocket chains, driving sprocket wheels for said sprocket chains, a sprocket shaft for said sprocket wheels, a continuously operating electric motor, a Yclutch for coupling said shaft to said motor, and means operable by the movement of said punch and die members for engaging said clutch after each complete operation of said die set and for disengaging said clutch after each complete circuit of said chains, said means including a clutch shipper fork, a pivotally supported yoke pivotally supporting said fork, a break-joint pivotally anchored at one end to said die set and pivotally connected at the other end to said yoke for operating the same, means carried by one of said carriages for breaking said break-joint to swing said yoke and shipper fork to clutch disengaging position after each complete circuit of said chains, and a member operable by the downward movement of said punch and die members for straightening said breakjoint to lock said yoke against pivotalV movement and operable by the upward movement of said ment thereof, in which the break-joint breakingmeans carried by the carriage is adjustable relative thereto inthe direction of carriage move-` ment, and in which said last mentioned member is adjustable to vary the length thereof,

23. A die set comprising a body, vertically movable punch and die members located above said body, a pair of carriages'supported for hori` Zontal movement along opposite sides of vsaid body, a wiper member supported by said carpunch and die members to swing said shipper fork riages for movement thereby over said body to remove therefrom stampings or punchings produced by said punch and die members, a pair ci endless sprocket chains extending in the direction of the carriage movement along said sides of said body, connections between said chains and the respective carriages wherebyY one complete reciprocation is imparted to said carriages and the wiper member sustained thereby for each complete circuit of said sprocket chains, an electric motor, a clutch for coupling said motor to said sprocket chains to drive the saine, and means controlled by the relative movement of said punch and die members for engaging said clutch after each complete operation of said die and-,Kor disengaging said clutch after each complete circuit of said chains, said means including a break-joint operatively connected at one end to said clutch for operating the same and pivotally anchored to said die set at its other end, a rocker lever mounted on lsaid die set and operable by one oi said carriages for breaking said break-joint and releasing said clutch, and a member operable by the movement of said punchand die members for straightening said break-joint and engaging said clutch.

24. A die set comprising a body, vertically movable punch and die members located above said body, a pair of carriages supported for horizontal movement along opposite sides of said body, a wiper member supported by said carriages for movement thereby over said body to remove therefrom stampings or punchings produced by said punch and die members, a pair of endless sprocket chains extending in the direction of the carriage movement along said sides of said body, connections between said chains and the respective carriages whereby one complete reciprocatiorris imparted to said carriages and the wiper member sustained thereby for each Vcomplete circuit of said sprocket chains, an electric motor, a clutch for coupling said motor to said sprocket chains to drive the same, and means controlled by the movement of said punch and die members for engaging said clutch after each complete operation of said die and for disengaging said clutch after each complete circuit of said chains, a break-joint pivotally connected at one end to said yoke for operating the same and pivotally anchored to said die set at its other end, a rocker lever mounted on said die set for break* ing said break-joint and releasing said clutch, a trip member mounted on one of said carriages and engageable with said rocker lever to move the same to break-joint breaking position, means for adjusting said trip member in the direction of carriage travel, and a member operable by the downward movement of said punch and die mem- .bers for straightening said break-joint and engaging said clutch.

CHARLES H. TAUSER. 

